DP Biology (first assessment 2025)

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Question 23M.2.HL.TZ1.b

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.2.HL.TZ1.b
Level HL Paper 2 Time zone TZ1
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 1]
23M.2.HL.TZ1.b

Outline the reason that the curve for fetal hemoglobin is to the left of normal adult hemoglobin.

[1]

Markscheme
  1. fetal hemoglobin has a higher affinity for oxygen then normal hemoglobin;
  2. oxygen will pass from normal/maternal/mother’s hemoglobin to fetal hemoglobin (in the placenta);

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